1.What force pulled a nebula inward to make Our solar system? gravity
2.How much of the solar nebula was pulled Into the sun (percentage)? 99%
3.How were the planets made from the Leftover gas and dust? The gas & dust contracted Into planetesimals, which collided, merged and formed protoplanets. The Protoplanets accumulated more rocks until they became planets.
4.How did Earth get its layers? Differentiation; the Most dense matter moved to the center, lighter masses were pushed up.
5.Which gases made up Earth’s earliest Atmosphere? What happened to them? Hydrogen and helium; they floated off into space because the Earth’s gravity was not strong enough to hold them down.
6.What gases were next to fill the atmosphere? Where did they... Continue reading "chuleta" »